Please check if your db user (which is set in wp-config.php) have the permission to create and alter db tables.
Also if you use multisite options may exists in wp_sitemeta table. delete from there also.
Then try to install again.
Please check if your db user (which is set in wp-config.php) have the permission to create and alter db tables.
Also if you use multisite options may exists in wp_sitemeta table. delete from there also.
Then try to install again.